| UPDATED: 15:39, Thu, Dec 10, 2020 Link copied Sign up for FREE for the biggest new releases, reviews and tech hacks SUBSCRIBE Invalid email When you subscribe we will use the information you provide to send you these newsletters. Sometimes they'll include recommendations for other related newsletters or services we offer. Our Privacy Notice explains more about how we use your data, and your rights. You can unsubscribe at any time. The frozen desert is the world’s southernmost continent, home to up to 5,000 dedicated researchers who study the planet's history and the effects of climate change in temperatures that drop as low as -90C. One of the ways they do this is by taking ice core samples. Since the ice forms from the buildup of annual layers of snow, lower layers are older than upper, and the snippets taken by the machine allows scientists to look back millions of years.